Four cities, one week

Four police helicopter fleets observed over the same week, mapped on one clock and one scale.

Every panel runs on the same clock and the same miles-flown scale, so the comparison is between the cities rather than between four separately tuned pictures.

The same reception caveat applies to all four: ADS-B coverage is incomplete everywhere, and each city’s figures are a floor.

Source: ADS-B from Airplanes.live; fleets from the FAA Releasable Aircraft Database. Analysis by The Basin. All videos · Next: 24 hours of LAX operations →